320879538 has 36 divisors (see below), whose sum is σ = 808749630. Its totient is φ = 91679616.

The previous prime is 320879521. The next prime is 320879557. The reversal of 320879538 is 835978023.

320879538 is a `hidden beast` number, since 32 + 0 + 87 + 9 + 538 = 666.

It can be written as a sum of positive squares in only one way, i.e., 320875569 + 3969 = 17913^2 + 63^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320879493 and 320879502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 181023 + ... + 182786.

Almost surely, 2^320879538 is an apocalyptic number.

320879538 is an abundant number, since it is smaller than the sum of its proper divisors (487870092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320879538 is a wasteful number, since it uses less digits than its factorization.

320879538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363831 (or 363821 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 320879538 is about 17913.1107851205. The cubic root of 320879538 is about 684.6164674173.

The spelling of 320879538 in words is "three hundred twenty million, eight hundred seventy-nine thousand, five hundred thirty-eight".